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The vaues of ""^(2) P(1) + ""^(3) P (1) ...

The vaues of `""^(2) P_(1) + ""^(3) P _(1) + ...+ ""^(n) P _(1)` is equal to

A

`(n ^(2) - n +2)/( 2)`

B

`(n ^(2) + n -2)/( 2)`

C

`(n ^(2) + n -1)/( 2)`

D

`(n ^(2) - n -1)/( 2)`

Text Solution

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The correct Answer is:
A
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